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KMID : 1151820150090030139
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Journal of the Korean Society of Radiology
2015 Volume.9 No. 3 p.139 ~ p.145
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Implementation of Filter for the Removal of Partial Volume Effect
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Park Min-Ju
Lee Sang-Bock
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Abstract
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When examining a patient using SPECT, gamma rays emitted from the body decrease or scatter. And when they reach the detector they spread in accordance with physical characteristics and geometric shapes of the scanner, quantitative analysis was difficult. For exact quantitative analysis of gamma rays emitted from the body, so that they must be considered to correction about PVE(partial volume effect). In this paper, sinogram filter was implemented to solve comprehensive PVE of SPECT. According to the results in which implemented filter was applied, partial volume effect caused by SPECT was removed. To compare proposed method and conventional method, PSNR(Peak Signal to Noise Ratio) was executed. As a result, proposed method was indicated as 7dB, conventional method was indicated as 14db respectively. dB(decibel) level of the proposed methods is lower, since the MSE(mean square error) becomes greater because scattered ray was removed, PSNR value is low. Therefore, by applying the proposed method for removing the PVE of SPECT imaging method, the image quality is improved.
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KEYWORD
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SPECT, partial volume effect, Sinogram, PSNR, MSE, Sinogram filter
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